/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
// "License": Public Domain
// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.

#ifndef PORTABLE_ENDIAN_H__
#define PORTABLE_ENDIAN_H__

#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)

#define __WINDOWS__

#endif

// GLIBC / Linux with endian(3) support, which was added in glibc 2.9.
// Intended to support CentOS 6 and newer.
#if defined(__linux__) && \
	((__GLIBC__ > 3) || \
	 (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))

#include <endian.h>

#elif defined(__CYGWIN__)

#include <endian.h>

#elif defined(__APPLE__)

#include <libkern/OSByteOrder.h>

#define htobe16(x) OSSwapHostToBigInt16(x)
#define htole16(x) OSSwapHostToLittleInt16(x)
#define be16toh(x) OSSwapBigToHostInt16(x)
#define le16toh(x) OSSwapLittleToHostInt16(x)

#define htobe32(x) OSSwapHostToBigInt32(x)
#define htole32(x) OSSwapHostToLittleInt32(x)
#define be32toh(x) OSSwapBigToHostInt32(x)
#define le32toh(x) OSSwapLittleToHostInt32(x)

#define htobe64(x) OSSwapHostToBigInt64(x)
#define htole64(x) OSSwapHostToLittleInt64(x)
#define be64toh(x) OSSwapBigToHostInt64(x)
#define le64toh(x) OSSwapLittleToHostInt64(x)

#define __BYTE_ORDER    BYTE_ORDER
#define __BIG_ENDIAN    BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN    PDP_ENDIAN

#elif defined(__OpenBSD__)

#include <sys/endian.h>

#define be16toh(x) betoh16(x)
#define le16toh(x) letoh16(x)

#define be32toh(x) betoh32(x)
#define le32toh(x) letoh32(x)

#define be64toh(x) betoh64(x)
#define le64toh(x) letoh64(x)

#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)

#include <sys/endian.h>

#elif defined(__sun) && defined(__SVR4)

#include <sys/types.h>
#include <netinet/in.h>
#include <inttypes.h>

#define be64toh(x) ntohll(x)
#define htobe64(x) htonll(x)

#elif defined(__WINDOWS__)

#include <winsock2.h>
#include <sys/param.h>

#if BYTE_ORDER == LITTLE_ENDIAN

#define htobe16(x) htons(x)
#define htole16(x) (x)
#define be16toh(x) ntohs(x)
#define le16toh(x) (x)

#define htobe32(x) htonl(x)
#define htole32(x) (x)
#define be32toh(x) ntohl(x)
#define le32toh(x) (x)

#define htobe64(x) htonll(x)
#define htole64(x) (x)
#define be64toh(x) ntohll(x)
#define le64toh(x) (x)

#elif BYTE_ORDER == BIG_ENDIAN

/* that would be xbox 360 */
#define htobe16(x) (x)
#define htole16(x) __builtin_bswap16(x)
#define be16toh(x) (x)
#define le16toh(x) __builtin_bswap16(x)

#define htobe32(x) (x)
#define htole32(x) __builtin_bswap32(x)
#define be32toh(x) (x)
#define le32toh(x) __builtin_bswap32(x)

#define htobe64(x) (x)
#define htole64(x) __builtin_bswap64(x)
#define be64toh(x) (x)
#define le64toh(x) __builtin_bswap64(x)

#else

#error byte order not supported

#endif

#define __BYTE_ORDER    BYTE_ORDER
#define __BIG_ENDIAN    BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN    PDP_ENDIAN

#else

// Unsupported platforms.
// Intended to support CentOS 5 but hopefully not too far from
// the truth because we use the homebrew htonll, et al. implementations
// that were originally the sole implementation of this functionality
// in iperf 3.0.
#if defined(__linux__)
#warning platform not supported
#endif
#if BYTE_ORDER == BIG_ENDIAN
#define HTONLL(n) (n)
#define NTOHLL(n) (n)
#else
#define HTONLL(n) ((((unsigned long long)(n) & 0xFF) << 56) | \
				   (((unsigned long long)(n) & 0xFF00) << 40) | \
				   (((unsigned long long)(n) & 0xFF0000) << 24) | \
				   (((unsigned long long)(n) & 0xFF000000) << 8) | \
				   (((unsigned long long)(n) & 0xFF00000000) >> 8) | \
				   (((unsigned long long)(n) & 0xFF0000000000) >> 24) | \
				   (((unsigned long long)(n) & 0xFF000000000000) >> 40) | \
				   (((unsigned long long)(n) & 0xFF00000000000000) >> 56))

#define NTOHLL(n) ((((unsigned long long)(n) & 0xFF) << 56) | \
				   (((unsigned long long)(n) & 0xFF00) << 40) | \
				   (((unsigned long long)(n) & 0xFF0000) << 24) | \
				   (((unsigned long long)(n) & 0xFF000000) << 8) | \
				   (((unsigned long long)(n) & 0xFF00000000) >> 8) | \
				   (((unsigned long long)(n) & 0xFF0000000000) >> 24) | \
				   (((unsigned long long)(n) & 0xFF000000000000) >> 40) | \
				   (((unsigned long long)(n) & 0xFF00000000000000) >> 56))
#endif

#define htobe64(n) HTONLL(n)
#define be64toh(n) NTOHLL(n)

#endif

#endif
